I would not misrepresent the size of your house in any form or fashion. I tust the buyers and their brokers helping them look for a 4 bedroom house to be perceptive enough to realize that your house has spare room they could use as a study, a hobby room, a play room, or whatever extra space they need. Although home viewing traffic is not generally heavy these days getting no traffic at all is extreme. Several other reasons may account for your lack of traffic. I am afraid I am on the side of your realtor. Discuss with yhim/her the other possible reasons for the low traffic. Good luck!